Comcast storing WiFi passwords in cleartext?

[Töma Gavrichenkov <ximaera () gmail com>]

Hi NANOG,

Here's an issue raised today:
https://security.stackexchange.com/questions/207895/how-does-comcast-know-my-wifi-password

Apparently there's a concern with customers that their seemingly
private passphrases, entered in their own boxes, are being shared with
the upstream ISP without an explicit customer consent, and are kept in
the ISP database for an unspecified period of time. Is it there by
design?

if so, then maybe some tweaks are necessary?

--
Töma